Only One of the Following Statements About Adolescents' Part-Time Employment

Only one of the following statements about adolescents' part-time employment is true. Which one?

A) Part-time jobs are most beneficial when they involve at least 20 hours of work each week.
B) Teenagers who have part-time jobs often gain valuable practice in important work skills.
C) Working more than 4 or 5 hours each week has a negative impact on adolescents' school achievement.
D) Part-time employment in the high school years increases the likelihood that adolescents will smoke cigarettes or abuse alcoholic beverages.